Final answer:
Adaptability to teacher's learning style is not a cognitive aspect for an older adult. Learning level, learning readiness, and motivation are all cognitive aspects that relate to the individual's capacity and willingness to learn.
Step-by-step explanation:
When considering which of the following is not a cognitive aspect for an older adult - learning level, adaptability to teacher's learning style, learning readiness, or motivation- it is important to focus on the cognitive components that are involved in the process of learning and intellectual development. The cognitive aspects pertinent to an older adult include learning level, which refers to the complexity or depth of understanding that an individual possesses, learning readiness, indicating their preparedness to learn, and motivation, which is the driving force behind an individual's desire to pursue learning.
Therefore, adaptability to teacher's learning style does not fall directly under the individual cognitive factors an older adult controls or possesses. While it can influence the learning process, it is more of a preference or environmental factor that can facilitate or hinder the learning process, depending on the compatibility between the individual and the teacher's style.